Simple tool to compare the contents of two files.

fcompare.cpp

/*
	fCompare By DreamVB
	Version 1.0
	Tool to compare the contents of two files.

	Please feel free to to use as you like.
	Please let me know if you found this code usfull e. dreamvb@outlook.com
*/

#include <stdio.h>
#include <string>

int main(int argc, char* argv[]){
	FILE *f1 = NULL;
	FILE *f2 = NULL;
	int addr = 0;
	int Ret = 2;
	char c = '\0';
	char d = '\0';

	if(argc < 3){
		printf("Usage: <InFile> <OutFile>\n");
		return 0;
	}

	//Open file 1
	f1 = fopen(argv[1],"r");

	//Check for errord.
	if(f1 == NULL){
		printf("IO/Error cannot open first file.\n");
		return 0;
	}
	//Open file 2
	f2 = fopen(argv[2],"r");

	//Check for error
	if(!f2){
		printf("IO/Error cannot open second file.\n");
		return 0;
	}

	//Get a char from each file.
	c = getc(f1);	//File1
	d = getc(f2);	//File2

	//First check to see if we have a match on the two chars c & d
	if(c == d){
		//Test that we are not at the end of the files and that both c & d match
		while((c != EOF) && (d != EOF) && (c == d)){
			//Fetch next chars
			c = getc(f1);
			d = getc(f2);
			//Current index that we are at
			addr++;
		}
	}
	//Looks like the files are a match
	if(c == d){
		printf("Both files are the same.\n");
	}else{
		//Looks like we have a bad match.
		Ret = 1;
		printf("Files do not match, Bad char at address: %d\n\n",addr);
		printf("Char at address %d in first file is %c\n",addr,c);
		printf("Char at address %d in second file is %c\n",addr,d);
	}

	//Close files
	fclose(f1);
	fclose(f2);

	return Ret;
}